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Re: Checking user input on dynamic regular expressions

by Tyke (Pilgrim)
on Apr 02, 2001 at 13:04 UTC ( #68958=note: print w/replies, xml ) Need Help??


in reply to Checking user input on dynamic regular expressions

I think you might want to pass $input through the quotemeta function in order to make sure that any regexp special characters are correctly escaped.

I don't see why it would be pointless...

Update Ack, of course it's pointless. 

add_to_todo_list(q(Think _BEFORE_ posting));

[download]
Begs pardon...

Replies are listed 'Best First'.
Re: Re: Checking user input on dynamic regular expressions
by cLive ;-) (Prior) on Apr 02, 2001 at 13:11 UTC 
    $reg_exp = '\d{4}';
$string = 'The year is 2001, the month is April.';

$req_exp = quotemeta $req_exp;
$string =~ /($req_exp)/;

print $1;

    [download]
    That doesn't print '2001', because it's trying to match \\d\{4\} instead of \d{4}

    cLive ;-)

[reply]
[d/l]

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